Found in old American documentation, this circuit is current as it uses the 555 to modulate an infrared LED. Pulses are set by R1.
We found this circuit in 1967 General Electric documentation. SCRs can be replaced by current...
This circuit was obtained in the publication 101 Electronics Projects from 1979. The circuit can...
This circuit was suggested in an article in Radio Electronics magazine in January 1992. Other...